S&P 500 bull run officially one for the ages

OK, pop the champagne. The bull market in the S&P 500 that began in March 2009 — when Lady Gaga’s “Just Dance” was on many an iPod playlist — on Wednesday officially became the longest stock run-up since the Great Depression.

The now 3,453-day bull run left the S&P at 2,861.82 — up a stunning 323 percent over nine-plus years.

The widely watched index started its stampede at a spooky intraday low of 666.

And while the rally hasn’t been the smoothest, the S&P 500 has chugged along through two presidencies without dropping 20 percent below its highs — at least not on a closing basis, which would have ended the bull run.

For all the exuberance, some noted Wednesday that the current bull market’s status isn’t firmly cemented until the S&P 500 finishes above its Jan. 26 closing high of 2,872.87.

The index only crossed the threshold on an intraday basis on Tuesday, when it briefly hit 2,873.23.

Despite the bull market naysayers, there was still plenty of room for excitement.

“Is this really the longest bull market ever? You can argue it either way, but the bottom line is probably no one back in March 2009 thought we’d even be having this argument,” Ryan Detrick, senior market strategist at LPL Financial, said in a note.

Detrick added that the bull market has room to run because of tax reform, strong corporate profits and increasing consumer confidence.

Cheering the record rally was President Trump, who celebrated the milestone on Twitter.

“Longest bull run in the history of the stock market, congratulations America!” Trump tweeted a few minutes after Wednesday’s market close.

The Dow Jones industrial average fell 88.69 points, to 25,733.60,